Explain Spark map() transformation?

349

---

What are the types of transformation in RDD in Apache Spark?

317

---

Why is transformation lazy operation in Apache Spark RDD? How is it useful?

286

---

Explain fullOuterJoin() operation in Apache Spark?

417

---

How many partitions are created by default in Apache Spark RDD?

305

---

Explain coalesce operation in Apache Spark?

318

---

Explain the level of parallelism in spark streaming?

289

---

Explain join() operation in Apache Spark?

354

---

How to process data using Transformation operation in Spark?

305

---

What is Resilient Distributed Dataset (RDD) in Apache Spark? How does it make spark operator rich?

279

---

What are the differences between Caching and Persistence method in Apache Spark?

313

---

Explain the operation reduce() in Spark?

286

---

Explain the lookup() operation in Spark?

229

---

Explain the processing speed difference between Hadoop and Apache Spark?

288

---

Explain the operation transformation and action in Apache Spark RDD?

323

---